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Iris pseudacorus

Yellow flag iris

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does flower in May

Plant does flower in June

Plant does flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

  • Botanical name: Iris pseudacorus
  • Common name: Yellow flag iris
  • Family: Iridaceae
  • Plant Type: Marginal, Evergreen
Flower colour:

Yellow

Foliage colour:

Green

Iris pseudacorus

Yellow flag iris, Iris pseudacorus, is a vigorous water iris, typicallly found growing at the edges of large, sunny ponds. It bears large clumps of green leaves from which elegant, yellow flowers appear in late-spring.

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Iris pseudacorus is ideal for wildlife gardens, and looks particularly good if planted in naturalised drifts among other moisture-loving plants. It also associates well with dark blue flowered plants. If you don’t have room for a pond or bog garden, try growing it in a large container filled with water. Divide clumps every three to five years to keep it under control.

How to grow Iris pseudacorus

  • Plant size

    1.2m height

    100cm spread

  • Aspect

    South facing, west facing

  • Sun exposure: Full sun, dappled shade
  • Hardiness: Hardy
  • Soil type: Clay / heavy / moist / boggy

Plant calendar

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Plant
Plant

Do not Plant in January

Do not Plant in February

Do not Plant in March

Do not Plant in April

Do Plant in May

Do Plant in June

Do Plant in July

Do Plant in August

Do Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does flower in May

Plant does flower in June

Plant does flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

Divide
Divide

Do not Divide in January

Do not Divide in February

Do not Divide in March

Do not Divide in April

Do not Divide in May

Do not Divide in June

Do not Divide in July

Do Divide in August

Do Divide in September

Do Divide in October

Do not Divide in November

Do not Divide in December

Iris pseudacorus and wildlife

Iris pseudacorus is known for attracting bees. It nectar-pollen-rich-flowers.

Attractive to Bees

Does not attract Beneficial insects

Does not attract Birds

Does not attract Butterflies​/​Moths

Does not attract Other pollinators

Is Iris pseudacorus poisonous?

Iris pseudacorus can be toxic.

Toxic to:

Toxic to Cats

Toxic to Dogs

Toxic to People

No reported toxicity to:

No reported toxicity to Birds

No reported toxicity to Horses

No reported toxicity to Livestock

Plants that go well with Iris pseudacorus

Typha minima
Plants

Typha minima

Dwarf reed mace
91069
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Primula bulleyana

Bulley's primrose